static bool has_instance() { return instance_ != nullptr; }
void load_platform(const std::string& platf) const;
+ void seal_platform() const;
void register_function(const std::string& name, const std::function<void(int, char**)>& code);
void register_function(const std::string& name, const std::function<void(std::vector<std::string>)>& code);